#!/bin/bash
#program:
#		use loop to calculate "1+2+3..+100" result.
#History:
#		2013/7/25	Leaguenew first release

s=0
i=0
while [ "$i" != "100" ]
do
	i=$(($i+1))
	s=$(($s+$i))	
done

echo "The result of '1+2+3..100' is  ==> $s "

